Means for conveying crushed material from a gyratory crusher



r a Z/ 14 /j 12 L. M: ANDERSEN Filed June 11, 1956 if. c

Jan. 20, 1959 MEANS FOR CONVEYING CRUSHED MATERIAL FROM A GYRATORYCRUSHER United States Patent" MEANS FOR CUNVEYING CRUSHED MATERIAL FROMA GYRATORY CRUSHER Louis M. Andersen, West Allis, Wis, assignor toAllis- Chairners Manufacturing Company, Milwaukee, Wis.

Application June 11, 1956, Serial No. 590,719

6 Claims. or. 198--56) This invention relates to gyratory crushers andin particular to a means for conveying crushed material from a gyratorycrusher to a remote location for storage or use.

Gyratory crushers are usually provided with a shaft assembly positionedvertically within an outer shell. The shaft assembly includes a crusherhead mounted on a rotatable shaft and the head cooperates with thesurrounding shell structure to define a generally annular crushingchamber. Crushed material is discharged from the crushing chamberthrough an annular opening around the bottom of the crushing chamber. Agyratory crusher of this type is shown and described in U. S. Patent2,349,790, granted May 23, 1944. As may be seen in this patent the lowerend of the crusher shaft may project a considerable distance below thecrushing chamber and may be provided with mechanisms for supporting theshaft, adjusting its vertical position, and drivingly engaging with theshaft to rotate the shaft and crusher head within the outer shell.Material crushed in such a machine is usually deposited on a singleconveyer passing beneath the crusher. For a single conveyer to receivematerial discharged from around substantially the entire circumferenceof the annular crushing chamber the conveyer must necessarily bepositioned below all the mechanisms associated with the lower end of thecrushing shaft. This results in space requirements having a verticalheight of such magnitude that it often becomes difficult or evenimpossible to install large machines of this type in existing buildingsnot having sufficient vertical space for mounting such a crusherassembly. Furthermore, by providing a conveyer beneath the lowest partof a crusher such as shown in the patent referred to, the mechanismsreferred to that may be associated with the lower portion of the crushershaft assembly are exposed to the material falling from the crushingchamber and the dust associated with such falling crushed material. Ittherefore becomes necessary to provide heavy protective housings forsuch mechanisms and effective seals to keep out dust.

According to the present invention a pair of conveyers are retractablymounted beneath the discharge opening of a crusher and arranged with oneon each side of the crusher shaft and in general parallel alignment witheach other. The conveyors are each vertically positioned so that anupper surface of each conveyer is above the lower end of a crusher shaftassembly in close proximity to the bottom of the crushing chamber. Apair of chutes are arranged with one on each side of the crusher shaftassembly with the chutes positioned to each connect onehalf of thedischarge opening of the crushing chamber to one of the pair ofconveyers. A third conveyer may be arranged transversely of the firstand second conveyers for receiving material from both of the pair ofconveyers for carrying the material to a place of storage or use.

An object of the arrangement according to the present invention is toprovide new and improved means for conveying crushed material away froma gyratory crusher which will reduce the vertical height and horizontalwidth 2,869,707 la tented Jan. 20, 1959 2 requirements of the spacerequired for the crusher and its associated equipment.

Another object of the present invention is to provide a new and improvedconveyer arrangement whereby a crusher can deposit crushed material upona conveyer without mechanisms associated with the lower portion of thecrusher being exposed to falling crushed material and the dustassociated therewith.

Another object of the present invention is to provide new and improvedmeans for carrying crushed material away from a gyratory crusher thatwill be retractable from the space beneath the crusher to provide accessfor inspection and repair of the various mechanisms associated with thelower portion of a crusher assembly.

Other objects will appear as the description of the invention proceeds.

The novel features of the invention and how the objects are attainedwill appear from this specification and the accompanying drawing showingan embodiment of the invention and forming a part of this application.

In the drawing:

Fig. l is a view of a crusher installation according to the presentinvention, in which portions of the crusher foundation structure alongwith portions of inner and outer crusher housing structures are brokenaway to more clearly show the arrangement of parts;

Fig. 2 is a view similar to Fig. 1 but as seen from the right side ofthe installation shown in Fig. 1;. and

Fig. 3 is a view of the crusher installation shown in Figs. 1 and 2 asit would be seen looking down upon the installation from above.

Referring to the drawings an embodiment of the present invention isshown in which a gummy crusher 1 is mounted upon support structure 2.The supporting structure 2 defines a space 3 beneath crusher 1 intowhich means will be arranged for receiving and carrying crushed materialaway from the crusher. The crusher itself comprises a shaft assembly it)made up of a shaft 11 held in a vertical position by hearing structure12. A crushing head 13 is mounted on the shaft 11. The shaft assembly 10is arra rged within an opening defined by a shell 17. The shell 17 maybe provided with a replaceable wear resisting liner 18. The crushinghead 13 and the shell 17 cooperate to define a crushing chamber 20.Material is discharged from crushing chamber 20 through an annulardischarge opening 21 around the bottom of chamber 20. Means for rotatingthe shaft assembly 19 within the shell 17 may be connected to the top ofthe shaft. 11 as shown in U. S. Patent 2,022,135, November 26, 1935 oras herein shown where a generally horizontally disposed pinion shaftassembly 25 is connected to the shaft assembly 10 at a pointintermediate the end portions of the main shaft assembly but beneath thedischarge opening 21 of the crushing chamber 20. In addition to thebearing structure 12 and the pinion shaft assembly 25 the lower end ofthe shaft assembly it) may also include mechanisms for adjustablysupporting the shaft 11 relative to the shell 1'7 as is shown in Patent2,349,790 previously referred to.

The means for conveying crushed material away from beneath the crusher 1after such material has passed through the crushing chamber 26 is shownas comprising a pair of conveyors 30 and 31 mounted beneath the crusher1 in the space 3. The conveyers 3t] and 31 are each mounted on rollers32 so that these conveyers may be retracted from the space 3 in order toprovide access to the mechanisms included in the lower portion of theshaft assembly 10. The conveyers 30 and 31 are arranged with one eachside of the shaft assembly 10 and in general parallel alignment witheach other. In embodiments such as the one shown in the drawings where apinion shaft assembly is driving ly connected to the {is lower portionof the crusher shaft assembly the conveyers 30 and 31 may be arranged inparallel alignment with the pinion shaft assembly.

, Means provided for receiving crushed material passing from thecrushing chamber 20 through the discharge opening 21 for depositing thiscrushed material on the conveyers 3d and 31, may include a pair ofchutes 36 and 37. The chutes 36, 37 are arranged with one on each sideof the pinion shaft assembly 25. One of the chutes 36 is positioned toconnect one-half of the discharge opening 21 to one of the conveyers 3tand the other chute 37 is positioned to connect the other half of thedischarge opening 21 to the other conveyer 31. A third conveyer 40 isarranged transversely of conveyers 3d and 31 for receiving material fromboth of these conveyers for transferring material to a place of storageor use on a single conveyer.

In operation material to be crushed will be delivered to the top of thecrusher 1 and dumped into the crushing chamber 2d defined by the shell17, its liner 18 if it is provided with one, and the crushing head 13.As the crusher shaft it rotates the material placed within the crushingchamber 20 will be broken up and will pass downwardly through thecrushing chamber 20 and out. the discharge opening 21. The crushedmaterial will then pass into the pair of chutes 3d and 37 and will bedeposited upon the conveyers 3t} and 33 which will in turn deposit thecrushed material on the conveyer 40 to be transported to a remotelocation for storage or use.

By the arrangement described it can be understood that the illustratedembodiment of the invention provides a new and improved arrangement thataccomplishes the objects of the invention. On the other hand it willalso be apparent to those skilled in this art that the illustratedembodiment of the invention may be variously changed and modified orfeatures thereof embodied in other combinations than that illustratedwithout departing from the spirit of the invention. Accordingly thedisclosure herein is intended to be illustrative only and the inventionis not desired to be limited thereto iri all of the details shown anddescribed in the foregoing.

What is claimed is:

1. In means for conveying crushed material from a gyratory crushersupported in an upright position on foundation structure, said crusherhaving a shell and a vertically positioned main shaft assembly at leastpartly within said shell, said shell having an inner wall surfacedefining a substantially annular discharge opening around said shaftassembly, the improvement comprising a first and second conveyer passingdirectly beneath said discharge opening, an upper surface of said firstand second conveyers being above the lower end of said main shaftassembly, said first and second conveyers Y being arranged with one oneach side of said main shaft assembly and in generally parallelalignment with each other, and a pair of chutes, one of said chutespositioned to connect one half of said discharge opening to one of saidfirst and second conveyers and the other of said chutes positioned toconnect the other half of said opening to the other of said conveyers,each of said chutes having discharge flow directing walls with at leasta portion of an outer Wall of said chutes being sloped downwardly andinwardly toward said shaft asneath said discharge opening, an uppersurface of said first and second conveyers being above the lower end ofsaid main shaft assembly, said first and second conveyers being arrangedwith one on each side of said main shaft assembly and in generallyparallel alignment with each other, a pair of chutes, one of said chutespositioned to connect one half of said discharge opening to one of saidfirst and second conveyers and the other of said chutes positioned toconnect the other half of said opening to the other of said conveyers,each of said chutes having discharge flow directing walls with at leasta portion of an outer wall of said chutes being sloped downwardly andinwardly toward said shaft assembly to direct the discharge flow inconverging streams onto said first and second conveyers, and a thirdconveyer arranged transversely of said first and second conveyers forreceiving material from both said first and second conveyers.

3. In means for conveying crushed material from a gyratory crushersupported in an upright position on foundation structure, said crusherhaving a shell and a vertically positioned main shaft assembly at leastpartly within said shell, said shell having an inner wall surfacedefining substantially annular discharge opening around said main shaftassembly, and a generally horizontally disposed pinion shaft assemblyconnected to said main shaft assembly at a point intermediate the endportions of said main shaft assembly and beneath said discharge opening,the improvement comprising a first and second conveyor passing directlybeneath said discharge opening, an upper surface of said first andsecond conveyers being above the lower end of said main shaft assembly,said first and second conveyers being arranged with one on each side ofand in generally parallel alignment with said pinion shaft assembly, anda pair of chutes arranged one on each side of said pinion shaftassembly, one of said chutes positioned to connect one half of saiddischarge opening to one of said first and second conveyers and theother of said chutes positioned to connect the other half of saidopening to the other of said conveyers, each of said chutes havingdischarge fiow directing walls with at least a portion of an outer wallof said chutes being sloped downwardly and inwardly toward said shaftassembly to direct the discharge flow in converging streams onto saidconveyers.

4. In means for conveying crushed material from a gyratory crushersupported in an upright position on foundation structure, said crusherhaving a shell and a vertically positioned main shaft assembly at leastpartly within said shell, said shell having an inner wall surfacedefining substantially annular discharge opening around said main shaftassembly, and a generally horizontally disposed pinion shaft assemblyconnected to said main shaft assembly at a point intermediate the endportions of said main shaft assembly and beneath said discharge opening,the improvement comprising a first and second conveyer passing directlybeneath said discharge opening, an upper surface of said first andsecond conveyers being above the lower end of said main shaft assembly,said first and second conveyers being arranged with one on each side ofand in generally parallel alignment with said pinion shaft assembly, apair of chutes arranged one on each side of said pinion shaft assembly,one of said chutes positioned to connect one half of said dischargeopening to one of said first and second conveyers and the other'of saidchutes positioned to connect the other half of said opening to the otherof said conveyers, each of said chutes having discharge flow directingwalls with at least a portion of an outer wall of said chutes beingsloped downwardly and inwardly toward said shaft assembly to direct thedischarge flow in converging streams onto said first and secondconveyers, and a third con veyer arranged transversely of said first andsecond conveyers for receiving material from both said first and secondconveyers.

5. In means for conveying crushed material from a gyratory crushersupported in an upright position on foundation structure, said crusherhaving a shell and a vertically positioned main shaft assembly at leastpartly within said shell, said shell having an inner wall surfacedefining substantially annular discharge opening around said main shaftassembly, and a generally horizontally disposed pinion shaft assemblyconnected to said main shaft assembly at a point intermediate the endportions of said main shaft assembly and beneath said discharge opening,the improvement comprising a first and second conveyer mounted onrollers passing directly beneath said discharge opening and movable awayfrom said discharge opening, an upper surface of said first and secondconveyers being above the lower end of said main shaft assembly, saidfirst and second conveyers being arranged with one on each side of andin generally parallel alignment with said pinion shaft assembly, a pairof chutes arranged one on each side of said pinion shaft assembly,

one of said chutes positioned to connect one half of said dischargeopening to one of said first and second conveyers and the other of saidchutes positioned to connect the other half of said opening to the otherof said conveyers, each of said chutes having discharge flow directingWalls with at least a portion of an outer wall of said chutes beingsloped downwardly and inwardly toward said shaft assembly to direct thedischarge flow in converging streams onto said first and secondconveyers, and a third conveyer arranged transversely of said first andsecond conveyers for receiving material from both said first and secondconveyers.

6. In means for conveying crushed material from a gyratory crushersupported in an upright position on foundation structure, said crusherhaving a shell and a vertically positioned main shaft assembly at leastpartly Within said shell and partly depending therebeneath defining alower shaft segment including a portion having the preselected maximumdiametric dimension of said shaft, said shell having an inner wallsurface defining asubstantially annular opening around said main shaftassembly and having an internal diametric dimension greater than saidpreselected maximum diametric dimension of said portion of said shaft,the improvement comprising: a first and second conveyor passing:directly beneath said discharge opening, one of said conveyers being oneach side of said main shaft assembly and in generally parallelalignment with each other; and a pair of chutes, one of said chutesbeing positioned to connect one-half of said discharge opening to one ofsaid conveyers, and the other of said chutes being positioned to connectthe other half of said opening to the other of said conveyers, each ofsaid chutes having discharge flow directing walls with a first portionextending vertically downwardly from said discharge opening into asecond portion being sloped therefrom downwardly and inwardly towardsaid lower shaft segment to direct the discharge flow in convergingstreams onto saidconveyers beneath said portion of said lower shaftsegment having said preselected maximum diametric dimension.

References Cited in the file of this patent UNITED STATES PATENTS669,060 Cascaden Feb. 26, 1901 1,215,739 Stehli Feb. 13, 1917 2,711,858Kennedy June 28, 1955 FOREIGN PATENTS 540,666 Germany Dec. 28, 1931

